CN1815130A - Sintered heat pipe and its manufacturing method - Google Patents
Sintered heat pipe and its manufacturing method Download PDFInfo
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- CN1815130A CN1815130A CNA2005100332101A CN200510033210A CN1815130A CN 1815130 A CN1815130 A CN 1815130A CN A2005100332101 A CNA2005100332101 A CN A2005100332101A CN 200510033210 A CN200510033210 A CN 200510033210A CN 1815130 A CN1815130 A CN 1815130A
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Abstract
Present invention discloses a sintering type heat tube and manufacturing method. Said method includes 1, providing a metallic shell and at least three kinds of metal powder with different particle size, 2, in turn filling above-mentioned metal powder in particle size scaling up or degressive sequence, each time using a cored bar as structure layer thickness control and rapid sintering,3, whole sintering after all metal powder filling-in, pulling out cored bar after completing sintering, 4, filling working fluid in shell cavity and enclosing said shell, to obtain sintering type heat tube with mutually complicated multiwall capillary structure in inner wall and distributed according to particle size scaling up or degressive sequence.
Description
[technical field]
The present invention is about a kind of heat transfer unit (HTU) and manufacture method thereof, particularly about a kind of sintered heat pipe and manufacture method thereof of utilizing the capillary principle to conduct heat.
[background technology]
In the existing heat radiation field, heat pipe is used widely owing to having the fast characteristics of heat transfer, it is to utilize hydraulic fluid in the housing to absorb when gas, liquid two phase inversion or the principle of emitting big calorimetric is carried out work, usually be provided with on the inner walls and be convenient to the capillary structure that condensed fluid refluxes, liquid quickened the required driving force that refluxes after its function provided condensation, this driving force derives from the pressure differential that capillarity produces, and capillary structure commonly used has channel form, mesh-like or sintered type metal powder powder etc.In use, one of heat pipe end (evaporation ends) places the high temperature heat source place, hydraulic fluid in the housing evaporates by heat into gaseous state, this steam flows to via the shell internal cavity emits heat behind the other end (condensation end) of heat pipe and is condensed into liquid state, this condensed fluid fast return evaporation ends and continue working cycles next time under the absorption affinity of inner walls capillary structure.
The capillary structure of existing inside heat pipe generally is the loose structure that adopts even and single hole, as sintered type metal dust structure.As everyone knows, the pore size of the size of the capillary force of capillary structure and the loose structure relation of being inversely proportional to.Hole when between loose structure hour, it has bigger capillary force, but frictional resistance and the viscous force that be subjected to when withdrawing fluid refluxes this moment are also bigger, i.e. the bigger backflow resistance of generation; Otherwise when the hole between loose structure was big, it was less to the resistance that withdrawing fluid produces, but the capillary force that is had also decreases.Therefore, the capillary structure that this structure is single can't be taken into account bigger capillary force and less liquid backflow resistance simultaneously.
[summary of the invention]
Technical problem to be solved by this invention is to provide a kind of sintered heat pipe of taking into account capillary force and backflow resistance, and the manufacture method of this sintered heat pipe.
For solving the problems of the technologies described above, sintered heat pipe of the present invention comprises metal shell, this inner walls is provided with capillary structure, to be at least three layers of powder particle being differed from one another by the particle size size form along the radially sintering of housing this capillary structure, and the particle size size of these powder beds is outwards arranged according to the order of increasing or decreasing along inner walls.
The manufacture method of this sintered heat pipe comprises the steps: that (1) provides a metal shell and at least three kinds of powder that the particle size size differs from one another; (2) in batches above-mentioned powder is increased progressively with the particle size size or the order of successively decreasing is inserted to housing successively, and when inserting a kind of powder of particle size at every turn all with a plug as the control of Laminate construction thickness and make Fast Sintering; (3) do integral sinteredly after all powder is all inserted in the housing, the plug that will insert for the last time after sintering is finished is extracted out; (4) in the housing cavity, charge into hydraulic fluid and airtight this housing.
Compared with prior art, sintered heat pipe of the present invention is by being disposed radially the powder sintered capillary structure that forms of the multiple layer metal that is differed from one another by the particle size size on inner walls, the capillary porosity that this multilayer capillary structure has is not of uniform size, wherein the metal powder layer that particle size is bigger can reduce the resistance that liquid refluxes, the less metal powder layer of particle size then can be kept stronger capillary force, thereby takes into account the capillary force of capillary structure and the backflow resistance of condensed fluid.
[description of drawings]
Below with reference to accompanying drawing, in conjunction with the embodiments the present invention is further described.
Fig. 1 is the axial section schematic diagram of sintered heat pipe first embodiment of the present invention.
Fig. 2 is the axial section schematic diagram of sintered heat pipe second embodiment of the present invention.
Fig. 3 (A) is the manufacture method process schematic diagram of the sintered heat pipe in the first embodiment of the invention to Fig. 3 (C).
[specific embodiment]
Fig. 1 is the axial section schematic diagram of sintered heat pipe first embodiment of the present invention, this sintered heat pipe 10 comprises a metal shell 12, be formed with the multilayer capillary structure 14 that constitutes by sintered powder grains on these housing 12 inwalls, this powder particle can be ceramic powder particle, perhaps be metal powder granulates such as copper powder etc., this multilayer capillary structure 14 is along the radially mutual stacked setting of housing 12, wherein be disclosed as three layers among the figure, promptly outwards be followed successively by internal layer 141 along housing 12 inwalls, intermediate layer 142 and outer 143, and layer with layer between the particle size size that adopted all different each other and be by housing 12 inwalls to arranging in proper order that axis direction increases progressively, the powder particle size minimum of internal layer 141, take second place in intermediate layer 142, outer 143 powder particle size maximums, promptly these three layers of orders that increases progressively successively by the particle size size are from the inside to the outside arranged, so make up the mixed type capillary structure 14 of gained, can take into account bigger capillary force and less liquid backflow resistance simultaneously, realize the optimization between capillary force and the backflow resistance, wherein, the skin 143 that particle size is bigger is owing to have bigger hair lyriform pore crack, suffered backflow resistance in the time of can reducing condensed liquid and reflux, and the less internal layer 141 of particle size is owing to have less hair lyriform pore crack, can keep bigger capillary force, make between layer and the layer the certain capillary pressure of generation poor, be that internal layer 141 has stronger capillary force than outer 143, make condensed liquid infiltrate to being full of whole tube wall zone toward internal layer 141 by outer 143 easily, simultaneously, the metal dust of internal layer 141 smaller particle size can increase and the heat of 12 of housings passes contact area, make easier being passed in the housing 12 of heat at high temperature heat source place, the lifting heat transmits, and like this then benign cycle hydraulic fluid in can realizing managing is conducted heat.
Fig. 2 is the axial section schematic diagram of sintered heat pipe second embodiment of the present invention, this sintered heat pipe 20 is that with the above-mentioned first embodiment difference its multilayer capillary structure is just opposite on arranging, promptly the capillary porosity is by the axle center and arranges to the order of housing 12 inwall directions increases between layer and the layer, the powder particle size maximum of internal layer 241, and take second place in intermediate layer 242, outer 243 powder particle sizes are then minimum, so, the less skin 243 in hair lyriform pore crack has stronger capillary absorption affinity, can quicken the speed that condensed fluid enters capillary structure, and by the bigger internal layer 241 reduction backflow resistances of hole, this heat pipe 20 is suitable for the short working environment of required heat pipe length.
Fig. 3 (A) is the manufacture method process schematic diagram of sintered heat pipe of the present invention to Fig. 3 (C), only describes at the described sintered heat pipe of first embodiment among the figure.At first, prepare metal dust such as the copper powder that three kinds of particle size sizes differ from one another, be formed in the housing 10 for a minute echelon by modes such as screenings; Then, in ready made metal shell 10, insert a plug 30a such as copper post, and between 30a and housing 10 inwalls, insert the fast preliminary sintering of metal dust work of particle minimum, shown in Fig. 3 (A); Afterwards, extract plug 30a out and replace the less plug 30b of another size, in housing 10, insert the bigger metal powder granulates of another kind of particle this moment and make fast preliminary sintering, shown in Fig. 3 (B), wherein the purpose of Fast Sintering is to make metal powder granulates temporarily to be connected on the housing 10, it is unlikely along diffusing taking off on the housing 10 after plug is extracted out, with the metallic copper powder is example, this Fast Sintering temperature is generally about 630 ℃, then repeat this step, promptly extract plug 30b out and replace the less plug 30c of another size, and in housing 10, insert the metal powder granulates of particle maximum, shown in Fig. 3 (C), at this moment, the metal dust of all granular sizes all is received in the housing 10, can carry out the integral sintered of metal dust, at the metallic copper powder, this integral sintered temperature is that the plug 30c that will insert for the last time after sintering is finished extracts out about 950 ℃; At last, charge into hydraulic fluid in housing 10 cavitys, the back and this housing 10 is carried out airtight of being evacuated promptly makes sintered heat pipe 10 of the present invention.In the above-mentioned process of inserting metal dust, the metal dust that changes various granular sizes is inserted order, can obtain the sintered heat pipe of each embodiment of the present invention, particle maximum as the metal dust inserted at first, and the particle of the metal dust of at every turn inserting later reduces successively, then can obtain the described sintered heat pipe of above-mentioned second embodiment.
Certainly said method also is suitable for second embodiment equally, falls in the meal gap of inserting earlier for the fine powder of inserting after preventing, can spray one deck macromolecule adhesive between layer and layer, and this adhesive can be fallen by burn off when pre-burning or final sintering.
Among the present invention, also can be on the basis of above-mentioned three layers of capillary structure, add more capillary structure layer again, in addition, difference according to employed housing and plug shape, can also produce multi-layer sintering formula heat pipe, as geometries such as circular, square, triangle or polygons with various cross sectional shapes.
Claims (9)
1. sintered heat pipe, it comprises metal shell, this inner walls is provided with capillary structure, it is characterized in that: to be at least three layers of powder particle being differed from one another by the particle size size form along the radially sintering of housing this capillary structure, and the particle size size of these powder beds is outwards arranged according to the order of increasing or decreasing along inner walls.
2. sintered heat pipe as claimed in claim 1 is characterized in that: this powder particle is metal dust or ceramic powders.
3. sintered heat pipe as claimed in claim 2 is characterized in that: this metal dust is a copper powder.
4. sintered heat pipe as claimed in claim 1 is characterized in that: this powder particle layer is three layers.
5. the manufacture method of a sintered heat pipe comprises the steps:
(1) provides a metal shell and at least three kinds of powder that the particle size size differs from one another;
(2) in batches above-mentioned powder is increased progressively with the particle size size or the order of successively decreasing is inserted to housing successively, and when inserting a kind of powder of particle size at every turn all with a plug as the control of Laminate construction thickness and make Fast Sintering;
(3) do integral sinteredly after all powder is all inserted in the housing, the plug that will insert for the last time after sintering is finished is extracted out; And
(4) in the housing cavity, charge into hydraulic fluid and airtight this housing.
6. the manufacture method of sintered heat pipe as claimed in claim 5, it is characterized in that: the powder that is provided is metal dust or ceramic powders.
7. the manufacture method of sintered heat pipe as claimed in claim 6, it is characterized in that: this metal dust is a copper powder.
8. the manufacture method of sintered heat pipe as claimed in claim 5, it is characterized in that: the temperature of Fast Sintering is about 630 ℃.
9. the manufacture method of sintered heat pipe as claimed in claim 5, it is characterized in that: integral sintered temperature is about 950 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100332101A CN100376857C (en) | 2005-02-04 | 2005-02-04 | Sintered heat pipe and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100332101A CN100376857C (en) | 2005-02-04 | 2005-02-04 | Sintered heat pipe and its manufacturing method |
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| Publication Number | Publication Date |
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| CN1815130A true CN1815130A (en) | 2006-08-09 |
| CN100376857C CN100376857C (en) | 2008-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100332101A Expired - Fee Related CN100376857C (en) | 2005-02-04 | 2005-02-04 | Sintered heat pipe and its manufacturing method |
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| CN (1) | CN100376857C (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425967A (en) * | 2011-12-05 | 2012-04-25 | 苏州聚力电机有限公司 | Thinned composite capillary texture and molding method and application thereof |
| CN102636059A (en) * | 2011-02-14 | 2012-08-15 | 昆山巨仲电子有限公司 | Heat pipe with compounding capillary and manufacturing method thereof |
| CN102878843A (en) * | 2011-07-15 | 2013-01-16 | 富瑞精密组件（昆山）有限公司 | Heat pipe |
| CN103528409A (en) * | 2013-10-24 | 2014-01-22 | 武汉大学 | Method for preparing loop heat pipe capillary core |
| CN103542751A (en) * | 2012-07-09 | 2014-01-29 | 富瑞精密组件（昆山）有限公司 | Heat pipe |
| CN106403671A (en) * | 2016-08-31 | 2017-02-15 | 新昌县杰创控股有限公司 | Vacuum high-speed metal heat transmitting tube and manufacturing process thereof |
| CN107335809A (en) * | 2017-07-05 | 2017-11-10 | 江苏萃隆精密铜管股份有限公司 | The preparation method of the evaporation tube of flooded evaporator |
| CN110160385A (en) * | 2019-01-31 | 2019-08-23 | 江苏集萃先进金属材料研究所有限公司 | A kind of capillary structure and its manufacturing method of the sintering of heat-transferring assembly inner cryogenic |
| CN110720675A (en) * | 2019-10-18 | 2020-01-24 | 深圳麦克韦尔科技有限公司 | Heating element, preparation method thereof and electronic cigarette |
| CN112129148A (en) * | 2020-09-24 | 2020-12-25 | 四川大学 | Sintered composite core heat pipe and preparation method thereof |
| CN113432467A (en) * | 2021-08-27 | 2021-09-24 | 南京工业大学苏州传感与纳米产业技术研究院 | Preparation method of metal ceramic composite capillary core |
| CN113739616A (en) * | 2021-09-27 | 2021-12-03 | 无锡市志成生化工程装备有限公司 | Gradient porous structure heat exchange tube with hydrophilicity and hydrophobicity and manufacturing process thereof |
| CN113865394A (en) * | 2021-09-29 | 2021-12-31 | 太仓市华盈电子材料有限公司 | Manufacturing method of sintered heat pipe |
| CN114251965A (en) * | 2021-12-27 | 2022-03-29 | 飞荣达科技(江苏)有限公司 | Low-thermal-resistance composite layered capillary structure for high power and manufacturing method |
| CN117680684A (en) * | 2024-02-04 | 2024-03-12 | 四川力泓电子科技有限公司 | Forming method of capillary structure in heat pipe and heat pipe |
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| CN113615887A (en) * | 2021-08-13 | 2021-11-09 | 深圳麦克韦尔科技有限公司 | Atomizing element, atomizer and electronic atomizing device |
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| DE2515753A1 (en) * | 1975-04-10 | 1976-10-14 | Siemens Ag | WARM PIPE |
| SU1038790A1 (en) * | 1981-09-07 | 1983-08-30 | Куйбышевский Ордена Трудового Красного Знамени Авиационный Институт Им.Акад.С.П.Королева | Capillary structure of heat pipe |
| SU1467354A1 (en) * | 1987-01-22 | 1989-03-23 | Истринское Отделение Всесоюзного Электротехнического Института Им.В.И.Ленина | Thermal tube wick |
| JP3956678B2 (en) * | 2001-11-15 | 2007-08-08 | 三菱マテリアル株式会社 | Heat pipe manufacturing method |
| CN2526894Y (en) * | 2002-01-07 | 2002-12-18 | 业强科技股份有限公司 | Heat conducting pipe |
| US6460612B1 (en) * | 2002-02-12 | 2002-10-08 | Motorola, Inc. | Heat transfer device with a self adjusting wick and method of manufacturing same |
| CN2640042Y (en) * | 2003-06-10 | 2004-09-08 | 业强科技股份有限公司 | Appliance for manufacturing heat-cnoducting pipe |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636059A (en) * | 2011-02-14 | 2012-08-15 | 昆山巨仲电子有限公司 | Heat pipe with compounding capillary and manufacturing method thereof |
| CN102878843A (en) * | 2011-07-15 | 2013-01-16 | 富瑞精密组件（昆山）有限公司 | Heat pipe |
| CN102425967A (en) * | 2011-12-05 | 2012-04-25 | 苏州聚力电机有限公司 | Thinned composite capillary texture and molding method and application thereof |
| CN103542751A (en) * | 2012-07-09 | 2014-01-29 | 富瑞精密组件（昆山）有限公司 | Heat pipe |
| CN103528409A (en) * | 2013-10-24 | 2014-01-22 | 武汉大学 | Method for preparing loop heat pipe capillary core |
| CN103528409B (en) * | 2013-10-24 | 2015-12-30 | 武汉大学 | A kind of method preparing loop heat pipe capillary core |
| CN106403671A (en) * | 2016-08-31 | 2017-02-15 | 新昌县杰创控股有限公司 | Vacuum high-speed metal heat transmitting tube and manufacturing process thereof |
| CN107335809A (en) * | 2017-07-05 | 2017-11-10 | 江苏萃隆精密铜管股份有限公司 | The preparation method of the evaporation tube of flooded evaporator |
| CN110160385A (en) * | 2019-01-31 | 2019-08-23 | 江苏集萃先进金属材料研究所有限公司 | A kind of capillary structure and its manufacturing method of the sintering of heat-transferring assembly inner cryogenic |
| CN110160385B (en) * | 2019-01-31 | 2021-04-27 | 江苏集萃先进金属材料研究所有限公司 | Capillary structure sintered at low temperature in heat transfer component and manufacturing method thereof |
| CN110720675A (en) * | 2019-10-18 | 2020-01-24 | 深圳麦克韦尔科技有限公司 | Heating element, preparation method thereof and electronic cigarette |
| CN112129148A (en) * | 2020-09-24 | 2020-12-25 | 四川大学 | Sintered composite core heat pipe and preparation method thereof |
| CN113432467A (en) * | 2021-08-27 | 2021-09-24 | 南京工业大学苏州传感与纳米产业技术研究院 | Preparation method of metal ceramic composite capillary core |
| CN113739616A (en) * | 2021-09-27 | 2021-12-03 | 无锡市志成生化工程装备有限公司 | Gradient porous structure heat exchange tube with hydrophilicity and hydrophobicity and manufacturing process thereof |
| CN113739616B (en) * | 2021-09-27 | 2024-04-19 | 无锡市志成生化工程装备有限公司 | Gradient porous structure heat exchange tube with hydrophilicity and hydrophobicity and manufacturing process thereof |
| CN113865394A (en) * | 2021-09-29 | 2021-12-31 | 太仓市华盈电子材料有限公司 | Manufacturing method of sintered heat pipe |
| CN114251965A (en) * | 2021-12-27 | 2022-03-29 | 飞荣达科技(江苏)有限公司 | Low-thermal-resistance composite layered capillary structure for high power and manufacturing method |
| CN117680684A (en) * | 2024-02-04 | 2024-03-12 | 四川力泓电子科技有限公司 | Forming method of capillary structure in heat pipe and heat pipe |
| CN117680684B (en) * | 2024-02-04 | 2024-05-10 | 四川力泓电子科技有限公司 | Forming method of capillary structure in heat pipe and heat pipe |
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|---|---|
| CN100376857C (en) | 2008-03-26 |
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